Dribbling refers to drooling, the accumulation and spilling of saliva from the mouth. The potential causes for this condition are numerous: excessive production of saliva, presence of a foreign object such as dentures, low muscle tone in the mouth, or even certain medications. There are measures you can take to try to stop drooling at night.
Sleep on your back with an ergonomic pillow that encourages back-sleeping and offers neck support for precisely that. Sleeping on your side can cause your mouth to hang open, causing your saliva to dribble onto bed linens.
Examine your manner of breathing during the day. Practice breathing with your mouth closed, through your nose. Verify that you breath in this manner until it becomes second nature to you and you no longer breathe with your mouth open.
Take cold medicine if you currently have a cold and think it could be causing your dribbling. For example, when people have a cold and have nasal congestion, they often sleep with their mouths open, which causes dribbling. A cold medicine containing a nasal decongestant will combat that. Cold medicine will reduce your symptoms and thus the nighttime dribbling.
Sip a caffeine-free beverage before bed or suck on a lozenge. Either move prevents dry mouth, which can cause excessive saliva and hence dribbling. When you have a dry mouth often your mouth tries to compensate by producing an excess of saliva to combat the situation, which can thus cause drooling.
Never hesitate to speak to your doctor before or after trying these solutions, particularly if certain medications are giving you a dry mouth which is leading to an excess production of saliva.